How to convert GrayCode to decimal?

GrayCode

Hello
I need a method to convert graycode to decimal
thank you

Re: GrayCode

Gray->Decimal conversion consists of two steps:-
1) Gray -> Binary
2) Binary -> Decimal


FIRST convert a Gray-coded number to binary by follow this method :-

The binary number and the Gray-coded number will have the same number of bits

The binary MSB (left-hand bit) and Gray code MSB will always be the same

To get the binary next-to-MSB (i.e. next digit to the right) add the binary MSB and the gray code next-to-MSB.

Record the sum, ignoring any carry.

Continue in this manner right through to the end.

e.g.

Gray Code 10011011 Binary Digit 1 = 1 (same as Gray code)
Gray Code 10011011 Binary Digit 2 = 0 + 1 = 1
Gray Code 10011011 Binary Digit 3 = 0 + 1 = 1
Gray Code 10011011 Binary Digit 4 = 1 + 1 = 0 (carry 1)
Gray Code 10011011 Binary Digit 5 = 1 + 0 = 1
Gray Code 10011011 Binary Digit 6 = 0 + 1 = 1
Gray Code 10011011 Binary Digit 7 = 1 + 1 = 0 (carry 1)
Gray Code 10011011 Binary Digit 8 = 1 + 0 = 1

and so

10011011gray = 11101101bin


Now Convert this binary to Decimal using the method given below!!!

Let ans start at 0 and suppose
the binary number is 11010111. Then compute new values of ans as shown
below: ans * 2 + 1 =>ans
ans * 2 + 1 =>ans
ans * 2 + 0 =>ans
ans * 2 + 1 =>ans
ans * 2 + 0 =>ans
ans * 2 + 1 =>ans
ans * 2 + 1 =>ans
ans * 2 + 1 =>ans

At this point, ans contains the converted number.

How is it possible to implement GreyCode using Shift Register? I saw someone implemented it, but I'm not remember how.

Converting Gray to binary is a full static conversion. Why would someone use shift register ?

http://www.interfacebus.com/gray-code-conversion-circuit-xor-gates.jpg